add some Japanese transforms

[Lyroxide]

Reference: https://tsukuba.repo.nii.ac.jp/record/3420/files/5.pdf

-rya is the -ba contraction, I can't think of any better romaji names. maybe '-ya' is better?

-cha is -ては contraction. usually it's followed by いけない, so "行っちゃいけない" gets highlighted as 行っちゃい (-chau < masu stem) which is incorrect. "行っちゃだめ" won't even show the plain form

-n usually appears in -んばかり, like いわんばかり

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[jamesmaa]

Btw you'll have to update after we merged #784

[Lyroxide]

@djahandarie Would need your review 🙏

[StefanVukovic99]

As the pdf says, the -rya contraction for verbs is pretty rare but there's no harm in having it I guess. Should 帰らなきゃ and such also be supported? Also, what do you think about, instead of having it deinflect directly to the dictionary form, going to -ba, like:

suffixInflection('けりゃ', 'ければ', [], ['ba']) // adding intermediate rule for ba

.
For naming, since the r sound is not always there, ya, (r)ya. If doing the chaining with -ba, maybe naming it ba -> (r)ya instead of contraction.

I don't see this kind of -n for verbs mentioned in the pdf, but I think it's good, since we currently have nothing for 話さんか and such.

-cha is good i think. 行っちゃいけない will still try and match the longest string, so it will say chau + masu, but that's a separate issue we should hopefully fix soon (should also start showing the descriptions on hover, maybe also which text preprocessing was applied)

[Lyroxide]

I think chaining -ba -> -ya sounds good

帰らなきゃ

yeah I forgot about that one. will add that in

rare

i think it's pretty common especially for ければ->けりゃ and れば->りゃ. but tbf I don't know if I have ever seen the rest, like 待ちゃ (???)